This basically describes just about every CL game I've ever been to at The Etihad.
I've sat in the same seat in Block 239 since 2003 - am always on all the Cup schemes with my son & daughter, and tbh since the dawn of the CL era at our place in 2011 I've lost count of the number of times random people are sat in our seats. Whenever you point out they are in the wrong one, without fail they look at their tickets and they are in the wrong row, wrong block or wrong seat numbers - or a combination of the 3; it's a miracle these people find the ground tbh.
We've regularly had PSG fans, Real fans, Celtic fans, Feyenoord Fans, Barca fans etc sat in/around us - or the dreaded half/half scarf tourists with selfie sticks, or blokes/women with iPads filming the entire game.
Sadly it's a penalty for being successful. Good teams/clubs attract the tourist fans or the Johnny Come Latelys - add this to the clubs complete lack of giving one iota of a shit about its own fanbase, and bingo....we have what we have.
I'm old enough to remember the days of that mad Super League breakaway when the likes of loyal blues were termed "legacy" fans, the swift reverse from it and the grovelling statements about how important the fans are and we will put them first etc etc, which we know is absolute bollocks.
Many of our loyal fans, who were the first to put their hands in their pockets when the club was up shit creek, got priced/shunted out of the 2nd tier in the East & West Stands and shoved into the 3rd Tier of the South Stand to pave the way for even more corporate seats. At that point all bets were off on the club giving even a passing concern to the fans best interests.
I live within 8 miles of the ground; I don't buy a programme, never visit the club shop on a Matchday and prefer to booze pre/post match in my local boozer or one outside the ground. In short, I'm not the type of fan the club wants anymore.